# include <stdio.h>
int main(void)
{
	int i;
	int sum=0;
	int a=0; 
	
	for (i = 1; i<=100; ++i)
	{
		if (i%2 == 1)
			sum += i;
			a++;		

	}	
	printf("sum = %d\n", sum);
	return 0;
}